ISO 22088-4:2006 PDF

Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 4: Ball or pin impression method

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Title (English):

ISO 22088-4:2006

Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 4: Ball or pin impression method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 13
Publication date:: August 10, 2006
Edition:: ISO IS 22088 edition 1 version 1
ICS:: 83.080.01

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Description (English):

ISO 22088-4:2006 specifies a ball or pin impression method for the determination of the environmental stress cracking (ESC) behaviour of plastics by means of a constant-strain test. The method is applicable to finished products and to test specimens prepared by moulding and/or machining, and can be used for the assessment of the ESC behaviour of a plastic product or material exposed to different environments, as well as for the determination of the ESC behaviour of different plastics materials exposed to a specific environment. An alternative method for the determination of environmental stress cracking by means of a constant-strain test is specified in ISO 22088-3 and ISO 22088-5. A method for the determination of environmental stress cracking by means of a constant-stress test is specified in ISO 22088-2.

Technical details

Technical committee: ISO/TC 61/SC 6 - Ageing, chemical and environmental resistance
SKU: ISO 22088-4:2006

Abstract

Overview

ISO 22088-4:2006 specifies the ball or pin impression method for determining resistance to environmental stress cracking (ESC) of plastics by a constant‑strain test. The method applies to finished products and to specimens prepared by moulding or machining. Tests expose specimens with impressed balls or pins to chemical environments (or air) to assess ESC behaviour and to compare materials or environments. The standard is part of the ISO 22088 series on ESC testing.

Key topics and technical requirements

Test principle: Drill and ream a hole, insert an oversize ball or pin to impose a constant local strain, expose the specimen to a test environment, then assess cracking visually or by mechanical testing.
Specimen types:
- Type A: Finished products - assessed visually for cracks (×5 magnification).
- Type B: Moulded/machined specimens - evaluated by tensile or flexural testing to defined failure criteria.
Failure criteria (Type B): reductions relative to deformation‑step zero, e.g. ~5% reduction in maximum tensile or flexural force, or ~20% reduction in tensile elongation at rupture (as specified).
Deformation series: Successive “oversize” steps (ball/pin diameters progressively larger) beginning with a zero‑deformation baseline.
Apparatus & dimensions: drills (≈2.8 mm), reamers (≈3.00 mm), polished balls/pins with tight diameter tolerances (±0.001 mm up to 4 mm), pin geometry and surface roughness requirements (pins with parallel section 10–50 mm, Ra preferably

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Test principle: Drill and ream a hole, insert an oversize ball or pin to impose a constant local strain, expose the specimen to a test environment, then assess cracking visually or by mechanical testing.
Specimen types:
- Type A: Finished products - assessed visually for cracks (×5 magnification).
- Type B: Moulded/machined specimens - evaluated by tensile or flexural testing to defined failure criteria.
Failure criteria (Type B): reductions relative to deformation‑step zero, e.g. ~5% reduction in maximum tensile or flexural force, or ~20% reduction in tensile elongation at rupture (as specified).
Deformation series: Successive “oversize” steps (ball/pin diameters progressively larger) beginning with a zero‑deformation baseline.
Apparatus & dimensions: drills (≈2.8 mm), reamers (≈3.00 mm), polished balls/pins with tight diameter tolerances (±0.001 mm up to 4 mm), pin geometry and surface roughness requirements (pins with parallel section 10–50 mm, Ra preferably

ISO 22088-4:2006 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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